C++ square bracket overloading

[Ixonal]

is it possible to overload square brackets on an object to take a string input or is it integer only?

[Tariqul Islam]

I am also interested to know the answer.

[Ixonal]

just read some wiki that said it's possible, but didn't give an example. when I try to do it, I get this...

ix_hash_test.cpp: In function ‘int main(int, char**)’:
ix_hash_test.cpp:21: error: invalid types ‘ixHash<int>*[const char [3]]’ for array subscript

edit: gah, I'm an idiot, it works. I had mytable["PI"], but mylist is a pointer, so it needed to be (*mytable)["PI"] to work

[misson]

The square bracket operator is an unary operator, and thus has the following signature.

return_type operator[] (index_type);

It's covered by section 13.5.5 [over.sub] of the C++ standard, which allows for arbitrary index type.